This is a little bit off topic, but also a little bit on topic. Another video for Quintin!!!! Remember when you were telling me about super cooling liquid...well...I looked into this cool idea you were telling me about and I found this video which explains why and how. All I can say is WOW! First I looked up the super cooled coke you were tellling me about and I was sure it was just a magic trick...until now:)
Expansion and Contraction Problem:
Inquiry Sheet:
Don't watch these videos until after you have made your best hypothesis for each of the problems in the inquiry sheet above:
1- What happens when we heat metal (just watch...don't try this at home)
2 - Ping Pong Ball
3a- Railroad gap
3b - Hanging Electrical lines
http://wiki.answers.com/Q/Why_do_overhead_wires_hang_with_a_slight_sag_in_the_summer_time_and_hang_tightly_in_the_winter
3c - Gaps in Sidewalks
http://wiki.answers.com/Q/Why_are_there_gaps_in_between_sidewalks
3d- Freezing water
This is a little bit off topic, but also a little bit on topic. Another video for Quintin!!!! Remember when you were telling me about super cooling liquid...well...I looked into this cool idea you were telling me about and I found this video which explains why and how. All I can say is WOW! First I looked up the super cooled coke you were tellling me about and I was sure it was just a magic trick...until now:)